| Boulder to Scottsboro (Alabama) | 1,115.83 mi (1,795.76 km) |
| Boulder to Scottsdale (Arizona) | 570.06 mi (917.43 km) |
| Boulder to Scranton (Pennsylvania) | 1,544.91 mi (2,486.29 km) |
| Boulder to Seabrook (Maryland) | 1,509.49 mi (2,429.29 km) |
| Boulder to Seabrook (Texas) | 924.94 mi (1,488.54 km) |
| Boulder to Seaford (New York) | 1,663.91 mi (2,677.80 km) |
| Boulder to Seagoville (Texas) | 702.32 mi (1,130.27 km) |
| Boulder to Seal Beach (California) | 829.10 mi (1,334.31 km) |
| Boulder to Searcy (Arkansas) | 808.97 mi (1,301.91 km) |
| Boulder to Seaside (California) | 926.77 mi (1,491.49 km) |
| Boulder to SeaTac (Washington) | 990.28 mi (1,593.70 km) |
| Boulder to Seattle (Washington) | 996.57 mi (1,603.83 km) |
| Boulder to Sebastian (Florida) | 1,644.76 mi (2,646.99 km) |
| Boulder to Sebring (Florida) | 1,610.91 mi (2,592.51 km) |
| Boulder to Secaucus (New Jersey) | 1,633.03 mi (2,628.11 km) |
